Convertible ice bunker for refrigerator cars



Aug. 31, 1943. A, F OIONNR 42,528,529

CQNVERTIBLE ICE BUNKR Fon REFRIGERATOR uns M1531 1943-- A. F. ocoNNoR` 2,328,529

CONVERTIBLE ICE BUNKER FOR EFHIGERATORCARS Filed No'v. 14, 1942 6 Sheets-'Sheet 2 Aug. 31, 1943. A. F. oc'oNNoR CONVERTIBLE ICE BUNKER FOR REFRIGERATOR CARS 6 sheets-sheet s Filed' Nov. 14, A1.942

IN V EN TOR.

Aug. 31,- 1943. A. F. ocoNNoR 2,328,529

I CONVERTIBLE ICE BUNKER FOR REFRIGERATOR CARS Filed Nov. 14. .1942

6 Sheets-Sheet 4 1NR/amok.

Aug. 31, 1943. A. F. ocoNNoR l2,328,529

CONVERTIBLE ICE BUNKER FCR REFRIGERATOR CARS Filed NOV. l14, 1942 6 Sheets-Sheet 5 INVENTOR Aug' 3L 1943- A. F. ocoNNoR 2,328,529

CONVERTIBLE ICE BUNKER FOR REFRIGERATOR CARS Filed'Nov. 14, 1942 6 Sheets-Sheet 6 IN VENTOR.

Mm if@ Patented Aug. 31, 1943 :CONVERTIBLE ICE BUNKER. FOR REF/RIGERATOR :CARS

Arthur F. QConnor, Chicago, 'Illr, assignorlto Union Asbestos 9p/Rubber -Gompany, Chica-gio, Ill., acorporationof Illinois kApplication,November 14, 1942, Serial .465,552

(Cl. 6ft-19) Glaims.

zilheffinvention relates toprefrgeratar cars and more particularly to .reirigerator Cars having ra transverse bulkhead forming 'one of the `Walls-of an ice bunker ,in `the'iend of the car; the ,bulkhead being movable from ice bunker formingv n0- sition to a stored position "adjacent `the walls of the car. The purposelof moving the bulkhead to a stored position `is to provide a longer lading compartment in the .car when ice bunker refrigeration isnot required. `It is estimated that not more than twenty-vepercent-of theloads hauled in refrigerator carsrelquire ice bunker refrigeration and, inasmuchas a .large majority of the ,existing,refrigeratorcars haveice bunkers permanentlybuilt ,in the 'ends `there-oi (bunkers which can not be folded orstored .in an out-Lofthe-way position), the importance of the ,movable bulkhead will be readily understooddue to the llarger load which-may be placed in thecar.

Refrigerator cars having` ice bunkers in .the ends thereof are usuallyfprovided with hatch openings in the roof of the car, above theice bunkers, `as a means .of loading ice into `the bunkers. When bulkheads are moved .to stored positions" itY will be understood that Apartei .the lading .will be below 'these ,hatch openingsland, as certain commodities aremoved under ventilation (the hatch 4covers beingppen or partlyopen) it Willfbeseen that thglading beneathitheopen hatches requires .protection `fiorrrtheelements,

such `as rain, ycinders and vdirt ,which might' de#Y scend upon theladingunlessmeans are provided to direct these ele-ments away =from the lading. The prior art shows deflectors of` diferentkir'ids placedunderneath thehatchY openings to deiiect theharmful elements from the lading; such deectors usually `being units separate from the bulkhead proper. "The most elcient ice bunker is one` having vertical ice retaining walls on` all `four sides of the bunker, these walls being spaced from the adjacent Walls ofthe V.car and bulkhead, providing ,verticalairducts around thelfonr vertical 'sidejstof the'ice mass lin the bunker. This type of ice bunker iskriQWIl asta basket .lbunkerand was recommended l,by the `U. S. ,Department of Agriculture as apstandardice bunker, inf itsgbulletln'No. 1398, .after exhaustive researchto determine'thebest typeof ice bunker. y

iNumeroustypes and designs of convertible bunkers andinovable bulkheads have vbeenltrii-id outbutmost of ,them eliininatedthehighlyldef s irableairlduct between the car side walls and theicem'ass, due to the ,factthat the side wall ducts interfered with moving the bulkhead from which the ladine might-.beaamaaea duetolthe shitting l0f the load longitudinally the oar) siillldl? .against damaged rlading and Yin order. ,ri .Rtmitthe :orderly vertical stacking of the 1 lading `(such as crates ,andc-artons), .the cubical capacity of'the'lading compartment in mani refrigerator cars being gured out so that .a certainnuniberfof cratestor cartons will snugly fill thegladi g3space and eliminate iloosepaclb d ine 4 ecobiS-,wiiiohmisnt .shift and n become. dam- One of the objects of the presentinventionis t0 provide aY movable bulkhead l and a denector, bothrofln-which l,combine to form the bulkheadlfor separating the ice bunker from the lading com- 1 rartgnent,Y,villen:inr extended positions, thereby eliminating :the-)necessity `for a, deflector uninin addition to the bulkhead.

Another object is to provide a` convertible-ice bunker` having a highly ldesirable land eiiicient sidewvallduct inthe iCelbiInker; the construction of the duotibeirlg .such'that it `Willrnot interiere with Vmoving i the bulkhead andy will preserveithe desirablegflilsh lading compartment wall .atgalltimea i LA `:further object fis the provision oza movable bulkhead of 'lesser dimensions and 4of Vlighter weightthan the conventional bulkhead (extendme substantiallyironrthe:can-ceiling tolthe car floor) therebylreducing the costof the Ibulkhead and providing la" bulkhead whichcando@` easily movedllfrornione :position to'another.

A ,further object is ,they provision of novel means for providing. a bulkheadY supportingitrack iiush .Withlthe inner-surface of'tlieladingcomparimentlsipigwau.

A-flurther Objectis to'provicie aLcleiiector for the hatch openingjwhich kwill permit the eriteriorair to enter thecarnand which will deect harmful elements awavfroln maladies, n

Another object is 1 :0 provide novelineans for moving Ithe'defefieotor to its raisedgpositionfalid the provision of novel means for lockingitinits several positions.

`A. further obl'et. is to V provide new'` and t novel means for ,providing a substantially llush end ,Wall for-the lading compartment, Awhen ythe Vbulkhead ris `in ,stored position and theprovision yof novel means for locking this iiush end wall in retracted position.

Another object is to provide novel means for bracing the bulkhead from the car end wall; this means being retractible and nestable with the bulkhead when not in use.

These and other objects and capabilities of the invention will be apparent from a study of the following description and the accompanying drawings.

in the drawings,

Figure 1 is a transverse vertical sectional View of a portion of a car end, taken along line I l of Fig. 2, the bulkhead bracing arms being shown in retracted position.

Fig. 2 is a longitudinal vertical sectional view of the same portion oi the car end, taken along line 2 2 of Fig. 1, the bulkhead bracing arms being shown in operative position.

Fig. 3 is a longitudinal vertical sectional View taken along line 3 3 of Fig. l, showing the bulkhead and its associated partsin stored position.

Fig. Il is a horizontal sectional view taken along line 2 4 of Fig. 2, showing the bulkhead in fixed, extended position.

Fig. 5 is an elevational view of a portion oi the side wall duct and the bulkhead supporting track means, taken along line 5 5 of Fig. 4.

Fig. 6 is an elevational view oi the end wall portion of the car, taken along line 6 5 of Fig. 2.

Fig. 'i is a fragmentary sectional view of the deiiector, taken along line 1 1 of Fig. l.

Fig. 8 is a fragmentary sectional view showing one method of locking the deector catch `in operative position.

Fig. 9 is a fragmentary-sectional view showing the catch means of Fig. 8 secured in retracted position. v

Fig. 10 is a side view of the member used to lock the deflector catch in extended and retracted positions.

In the drawings, the reference numeral i0 indicates the top wall, while l2, I4 and It indicate the side wall, endwall and bottom wall of the car, respectively; all of which may be of conventional insulated construction. The ear ceiling i3 may have an upwardly offset portion 2i! above the ice bunker, within which oilset portion the deector may be nested when in raised position in order to preserve a substantially iiush ceiling line above the lengthened lading cornpartment. A hatch 22 may be provided in the top wall I Aalcove the ice bunker and an ice supporting grate 2d may define the bottom wall of the ice bunker. A floor rack 26 jmay be provided in the lading compartment oi the car and l may be separated from the grate 24 by a transversely extending plate member 28, located coincident with and below the lower margin of the extended bulkhead. The ice grate 211, the iioor rack 2S and the plate member 28 may all be supported in overlying, spaced relationship with the car iioor 30 wherebyy to provide an air duct bee tween the ice and the car floor and between the lading and the car floor, to permit the free circulation of the chilled air throughout the length of the car floor.

A transversely extending bulkhead 32 may be provided to separate the lower portions of the ice bunker and the adjacent lading compartment and it will be noted that the vertical dimension of this bulkhead is considerably less than the like dimension of the conventional movable bulkhead. One oi the important advantages oi this' smaller bulkhead is its lower cost, lighter weight and the greater ease with which it may be moved. The conventional bulkhead extends substantially from the car ceiling to lading iioor land is rigidly constructed throughout its entire area in order to resist the shifting of the car lading on one side and the ice mass on the other side, due to sudden shocks received in service, as by sudden starting and stopping of the car in oar switching service. inasmuch as the lower part oi the lading produces most of the shocks and stress against the bulkhead, it is obviousthat the lower portion of the bulkhead must meet certain requirements or rigidity and strength, whereas the upper portion does not require the same strength. The bulkhead 32 of the present invention is intended to extend from the lading floor to a point above the lower hall' of the car interior. A deflector 34 may be provided above and in coplanaralignrnent with the bulkhead 32 to complement the bulkhead 32 in providing a wall dividing the ice bunker from the lading compartment and extending from the car ceiling vtothe lading ioor.

The bulkhead. 32

The bulkhead 32 may include a rectangular frame having opposed vertical marginal posts 36 of box-like construction and intermediate aligned posts lid of substantially U-shaped construction having open sides facing the ice bunker. The Vposts 35 and 228 may be secured adjacent their upper ends to a horizontal frame member it and may have their lower ends secured to a horizontal frame member 52. A wooden lining fil may be axed to the lading compartment side of the kbulkhead frame and a metallic lining Il@ (either perforate or imperiorate) may be affixed to the ice bunker side of the frame; lining lf3 and being in parallel spaced apart relationship,` providing a vertical air duct therebetween. The intermediate posts 38 may be provided with opposed outwardly extending marginal flanges adapted as mounting means for the lining i6 and may have longitudinally extending bulkhead bracing arms 48 nested within the channels of the posts and pivotally connected to the posts adjacent the upper portions thereof; the arms l5-8 being selectively swingable upwardlyV to a horizontal position, with the free end portions thereof adapted to interlockingly engage a keeper member ilsecured to the car end wall. The side posts 36 may be provided adjacent their upper ends with rollers 52, adapted to movahly support the bulkhead upon track means if' afiixed to the side wall of the car.

- The (reflector 34 f rl'he deflector 34 may 'include a rectangular frame having aligned vertical posts 56 of boxlike construction, an angular horizontal top frame member 58 secured to the upper ends of, the posts 5E, and 'an angular horizontal lower frame member @il secured to the lower ends of the posts 5t. A metallic sheet S2 may be ainxed, to the lading compartment side of the frame and may be provided with a series of apertures hav` ing inwardly flanged marginaliportions 64, adjae cent the upper Vmargin of the sheet 62. The marginal portions 63 of the apertures may ex-. tend perpendicularly to the plane of the sheet 6?. and forni a continuous flange around the periphy ery of each aperture. A wooden lining 66 may with the side wall H0. The lower portion of theA outwardly offset Wall portion may be provided with a metal lining ||4 extending in a common plane with the side wall H0. The linings vH2 and H4 may be mounted in spaced parallel relation with the oiTset wall portion upon vertical spacing strips I6, and may act as retaining walls for the ice adjacent the side wall of the bunker, providing the highlydesirable side wall air ducts recommended by competent authorities. The track means for movably supporting the bulkhead may be disposed within the offset wall portion, intermediate the Alinings H2 and H4, and may comprise a horizontally disposed metal plate H8 secured, as by bolts, in ilatwise abutting engagement with the offset wall portion and provided adjacent its ends with outwardly turned flanged ends. The track 54 may be aflixed in parallel spaced relation with the lower portion of the plate H8 by means of a series of spaced apart vertically extending webs |20, the end portions of the track 54 having backing engagement with the flanged ends of the plate H8. In order to maintain the rollers 52 in operative engagement with the track 54, a substantially flat metal plate |22 may be removably mounted upon the plate H8 by means of set screws |24. The plate I I8 may be provided with a plurality of outwardly extending bosses |25 rigidly afxed thereto and provided with threaded apertures adapted to receive the screws |24, the ends of the bosses having backing engagement with the plate |22. The plate |22 may be removed for the purpose of removing the bulkhead from the car. It will be noted that, although the track means is considerably lower in the car than the conventional track means adjacent the ceiling, it does not project into the lengthened lading compartment and provides a substantially flush surface with the side wall H0. It will also be noted that the track means and mounting therefor obstructs the important side wall duct to a negligible extent.

A latch member |23 may be secured to the top wall ID adapted to hold the deflector 34 is raised operative position and may comprise a bar of angular configuration pivotally secured to the top wall I0 by means oimounting angles |30 and a pivot member |32, the latch member |28 being adapted to automatically fall into holding position with the deector by gravity, as the deflect-or is raised to horizontal position. A locking member |34 may be pivotally and swingably secured to a vertical ange of one of the mounting angles and may comprise an elongated rod having an eye at its upper end and two laterally pro- `iecting membersl |36 along one side of the rod: one of the members |36 being adapted to be inserted through a hole |29 in the latch member |28 to hold it in locked deflector supporting po sition, the other member |36 being adapted to be inserted through the same hole to hold the latch member |28 in a retracted, out-of-the-way position. The ends of the members may be provided with apertures to receive a cotter or other securing means.

Means for raising the deilector 34, from vertical to horizontal position, may be provided, as best shown in Fig. 2, and mayv comprise a chain or light weight wire rope |38 secured at one end to one of the end portions of one of the posts 56 of the deflectcr, the chain or ropepassing over a pulley |40 near the end wall and ceiling 20, and then passing over a pulley |42 aixed in a recessed portion |44 in the ceiling I8, above the extended bulkhead. One end of the chain or rope |38 may depend from the pulley |42 and maybe provided with a ring or other suitable grasping means |46. When the deflector is in vertical position the ring |43 may be closely adjacent the ceiling I3 and, after raising the deiiector to horizontal position with the chain or rope |38, the ring |46 and the chain or rope adjacent thereto may be disposed adjacent theA ceiling |8 and secured by a hook on the ceilingA |3 or the upper portion of the side Wall It will be understood that the chain or rope |38, and its appurtenances, are not necessary to the opera-` tion of the bulkhead and deflector, as both the deflector and the bulkhead may be moved otherwise, from one position to another. If the chain or rope |38 is used, I prefer to locate it along the longitudinal center line of the car, where it will not be adversely affected by thedropping of ice through the hatches 22. There are usually two hatches in each endfof the car, o-ne on each side of the longitudinal center line, for which reason the locating of the chain or rope adjacent the center line of the car will place it between the hatches. The longer ilange oi the top frame member 58 may be notched out along its edge, adjacent the center line of the car, in order to permit the chain or rope to pass this flange when the delector is in horizontal raised position. The use of the chain or rope |38, as a means of raising and lowering the delector will add to the safety of operation, as the operator will be obliged vto move farther away from the ventilator as it is moved to its horizontal position, and the danger of its accidentally falling upon him will be minirnized.

The lower portion of the bulkhead 32 may be locked in both extended and stored positions by any of the conventional methods, such as vertical locking bolts on the bulkhead and movable into holding engagement with part of the floor structure, this means not being shown and forming no part of the present invention.

One or more of the bulkhead bracing arms 48 may be provided with a detent member |48 adapted to maintain the vertical deector 34 against movement toward the car end, when the arm 43 is in secured horizontal position.'

Reference to the regular lading compartment herein is intended to mean the lading compartment between extended bulkheads and the lengthened lading compartment refers to the lading compartment when the bulkheads are in stored position.

It is to be understood that the linings 46, '|4,

f E2, 34, H2 and ||4 may comprise imperforate or perforate material, wire mesh or expanded metal, without departing from the scope of the invention. The wooden linings 44 and 6G may be secured to their respective members in any of the conventional methods, as by clips, bolts or both. The metal linings may also be amxed to their respective mountings in conventional manner. Any of the parts which are indicated as being affixed to the car structure (and the specific fastening means not shown in the drawings) are intended to be secured by any of the conventional means, this means forming no part of the present invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:` l v l. In a refrigerator car havingan ice bunker at` an end thereof separated from an adjacent compartment by a rbulkhead including an upper section swingable to va, stored rposition adjacentY spasmes the`` car top i wall and a` lower sectiom movable to a storedtposition. adjacent the car` jend wally. said upper sectionA and saidi lower section Iliavingwall portions inA substantial coplananl vertic'alvalignment forming an end fwall forsaidcompartment 2. In a refrigerator car having an" icel bunker atV4 an end thereof? separated from `anadjacent compartment byv a `bulk-head includingan upper section swingable` to a horizontal' storedi `position adjacent the car-"topfwall andl a :lower section movable .to Y an upright position4 adjacent the -oar end wall; said'uppersectionand saidlwer section being separated? adjacent vtlielirvlower and upper boundaries,` respectively, adjacent the` hor'- izontal center lineof the car.

3. In a refrigerator '-car having anice bunker at an` end-thereof separated from-'an adjacent compartment by abulkhead including anupper section hingedly `and swingably` securedv to the` car top wall and movableto a stored position parallel with the car top walland alower section supported by track 'means and` movable to a verticalstored position adjacentthecar end wall; saldi upper section and said lowerjsection being separated adjacent their lowerandupper boundaries; respectively, at a point removed 4from the top wall and the bottom wall ofthe'car.

4'. Ina refrigerator carfhaving an ice bunker at an' end thereof separated from an. adjacent compartment by a bulkhead including an upper sectionA and a lower sectionV separated adjacent their lower andi upper boundaries, respectively, and movable to store'dpositions within the car; each section being provided with vertical spaced apart walls forming opposed' walls of an air duct therebetween,the spaced apart'wallsof one section being in substantially'coplanar. alignment with the spaced apart'A walls of the" other section and the air duct of each section'jbeing in .substantially coplanar alignment'witlr the Vair duct `of the other` section providing a" substantially continuous vertical air duct throughout the aligned sections oi the bulkhead.v i

5. In a refrigerator car havingia` convertible ice bunker in an end thereofsepa'rated from an adjacent compartment by a bulkhead including a swingably supportedupp'er section and a rollably supported lower section, both sections being movable to stored'positions within. the car; said upper section and said lowersection having `plane boundaries forming theend' wall of said compartment, said upper'section and. said lower section being divided coincidentwith 4their l'ower andupper boundaries, respectively,4 into comple-I mentary sections adapted' to form saidbulkhead.

6. A transverse bulkhead dividingthe interior of a refrigerator car into .separate compartments including an upper section swingabl'ejto Va storedv position parallel with and adjacent the car top wall4 and a lower sectionmovable to an upright stored position adjacent the car end wall; the upper boundary of said lower section being coincident and parallel with the lower boundary of said upper section and being adapted for interlocking relationship with said lower boundary whereby to limit the movement of said upper section in one direction longitudinally of the car when said bulkhead is in operative position dividing the car interior into separate compartments.

7. In a refrigerator car having an `ice bunker at an end thereof separated from an adjacent compartment by a bulkhead including an upper section and a lower section movable to stored positions within the car; said lower section being movable to a vertical position adjacent the lower portion of the car end' wall when stored; a wall section movably secured tol said end wall above the' stored lowerV section. oi thefbulkhead adapted to be Vmoved outwardly from said end wall to form asubstantiallyccoplanar continuation of the outer vertical wall vof.` said stored lower section.

8. The combination of claim y'?,wherein locking means is affixed to said end wall and adapted to selectively'secure the movablewallsection in retracted positionA adjacent said end wall and to' permit said wall section to be moved to extended position away from said end wall.

9.' Ina refrigerator car havingan ice bunker in Aan end thereof separated from an adjacent compartment by a bulkhead including an upper. section and a lower section movable to stored positions within the car; said lower section having a vertically extending channeled portionopen toward the car endwall, an elongated horizontally disposed `bulkhead bracing arm movably secured adjacent one of its ends toY said lower section and removably secured adjacent its opposed end to said end wall, said arm being selectively movable from its horizontal operativeposition to an inoperative vertical nested position within said channeled' portion.

`10. The combination lof claim 9, wherein an endfp'ortion of said bracing arm is providedwith a laterally disposed detent portion adapted to engage and limit the movement of said upper section inone direction longitudinally of ythe car `when said arm is in horizontal operative position. d i

11. In a refrigerator car having anice bunker in an end thereof separated from an adjacent compartment bya bulkhead includingan upper section swingable to a stored position parallel with and'` adjacent the top wall of the car and a lower section movable to a vertical stored posi- `tion adjacent the end wall of the car; saidupper section and said lower section being separated coincident with their lower and upper boundaries, respectively, the lower margin of said upper section including detent means in overlapping engagement with said lower section adapted to limit the movement of said lower margin in a direction away from said end wall when' the bulkhead is in. extended operative position.

12. In a refrigerator car having an ice bunker in an end thereof separated from a lading compartment by a bulkhead including an upper section and a lower. section movable to stored positions within the. car;` said bunker having a vertical. air duct adjacent the car side wall and disposed intermediate the inner and outer surfaces of said side wall, said lower section being movablel to 4an upright stored position adjacent the car end wall and being movably supportedv upontrack means vaiiixed to said side wall within the boundariesof said` air duct, said lower section being provided" with a member extending within said air duct and movably supported by said track means.

13. The combination oi' claim 12, wherein said track means is provided with a member adapted to maintain said lower section in cooperative movable engagement with said track means, said member being selectively removable from said track means to permit the removal of said lower section from cooperative engagement with said track means.

14. The combination of claim 12, wherein said track means is disposed within and intermediate the upper and lower portions of said vertical air duct, said track means including a mounting member aixedto the outer wall of said duct and a track member secured to said mounting member in spaced relation therewith, and spaced apart connecting membersafixed at one end to said mounting member and afEXedat the opposed end to said track member, said track means being adapted to provide air communication between the upper and lower portions of the air duct, through said track means.

15. The combination of claim l2, wherein-said track means is disposed within and intermediate the upper and lower portions of said vertical duct, said upper and lower portions of said duct being provided with wall portions substantiallyY coplanar with the inner surface oi the lading conipartment side wall and forming retaining walls for the e in the bunker, a horizontally slot being provided coincident with said track. member intermediate said upper and lower portions oi said duct whereby to permit the move ment of the lower section of the bu khead long-y tudinaily of the car.

i6. In a refrigerator car having an ice bunker in an end thereof separated from an adjacent compartment by a-bulkhead including an upper section and a lower section movable tcstored positions within the car, said upper section being swngable to a retracted stored position parallel with and adjacent the car top wall; a pulley aixed to the cor adjacent the free margin ci the stored upper section, a second pulley aised to the car top wall above the bulkhead, iieXible means affixed to the lower portion of said upper section and extending progressively around said rst named pulley and said second pulley, the free end of said'flexible means depending from said second pulley within said compartment whereby a person in said compartment may raise and lower said upper section by manipulation of said iiexible means.

17. In a refrigerator car having an ice bunker at an end thereof separated from an adjacent compartment by a bulkhead including an upper section and a lower section movable to stored positions within. the car, said upper section being swingable to a stored position parallel with and adjacent the car top wall; a pivoted datent secured to the car adjacent a margin of the stored upper section selectively movable into and out of cooperative supporting engagement with said margin.

i3. The combination of claim 17, wherein a locking member is secured to the car adjacent the pivoted detent and selectively movable into cooperative engagement with said detent adapted to maintain said detent in cooperative sup* porting engagement with said margin.

19. The combination of claim 17, wherein `a locking .member is secured to the car adjacent the pivoted detent and selectively movable into cooperative engagement with said detent whereby Iii) to maintain said detent in cooperative supporting engagement with said margin, said locking member also being selectively movable into cooperative engagement with said detent adapted to maintain said detent in a retracted inoperative position.

20. In a refrgeratorcar having an ice bunker in an end thereof separated from an adjacent lading compartment by a bulkhead including an upper section and a lower section movable to stored positions within the car; said upper section having a vertically corrugated wall forming an ice retaining wall for said bunker and a spaced apart wall forming opposed walls of a vertical air duct therebetween, means forming an aperture in said spaced apart wall adapted to provide air communication between said lading compartment and said ice bunker, said corrugated wall being substantially imperforate opposite said aperture whereby to deflect air, passing from said lading compartment to said bunker through said aperture in a horizontal direction, in a downward direction into said vertical air duct.

21. The combination of claim 20, wherein the top wall of the car is provided with a hatch opening above the ice bunker and said upper section is swingable to a substantially horizontal position adjacent and underlying said hatch opening, the imperforate portion of the corrugated wall being in overlying relationshipwith said aperture when said upper section is in stored position adapted to deiect air and air-borne elements away from said aperture, the valleys cf the corrugations being adapted to form horizontal air ducts to direct the deflected air and airborne elements toward the end wall of the car.

22. The combination of claim 20, wherein said upper section is swingable to a substantially horizontal position adjacent and underlying a hatch opening in the car top wall above the ice bunker and when in this position the aperture has upstanding peripheral flange adapted to prevent moisture and other elements from passing. through said aperture after being deflected away from said aperture by the imperforate portion of the corrugated wall. t

23. rhe combination of claim wherein a hatch opening is provided in the car top wall above the ice bunker and said upper section cf the bulkhead is swingable to a substantially horizontal position adjacent and underlying said hatch opening; the valleys of the corrugations in said corrugated wall forming horizontally disposed air ducts when the upper section is in said horizontal position adapted to direct deflected air in a direction toward the end wall of the car, the ends of the corrugations adjacent said end wall being open and the opposed ends thereof being substantially dammed.

ARTHUR F. OCONNOR. 

